Anionic polysaccharide composition for textile care

Abstract

The invention concerns a composition for cotton textile care in particular, comprising an anionic polysaccharide (in particular anionic polygalactomannan) having a mole weight higher than 250000. The composition can be a solid or liquid detergent formulation, a liquid rinsing and/or softening formulation, a drying additive contacted with wet textile in a dry textile, an aqueous ironing formulation, a prespotting washing additive deposited on the textile before a washing operation.

1 . A composition for caring for articles made of textile fibers, characterized in that it comprises at least one anionic polysaccharide with a weight-average molar mass of greater than 250 000 and preferably greater than 500 000, the native skeleton of which is a polysaccharide formed from 
 a main chain comprising identical or different anhydrohexose units, and    branches comprising at least one neutral or anionic anhydropentose and/or anhydrohexose unit the anhydrohexose and/or anhydropentose units of said anionic polysaccharide being substituted or modified with at least one anionic group or a group that may be anionized at the working pH of said composition, the degree of substitution or of modification DSi of the anhydrohexose and/or anhydropentose units with said anionic or anionizable group(s) ranging from 0.1 to less than 3 and preferably from 0.2 to 2.5.    
     
     
         2 . The composition as claimed in  claim 1 , characterized in that the ionic or ionizable groups are linked to the carbon atoms of the sugar skeleton either directly or via —O— bonds.  
     
     
         3 . The composition as claimed in  claim 1  or  2 , characterized in that the ionic or ionizable groups contain one or more carboxylate, sulfonate, sulfate, phosphate or phosphonate functions.  
     
     
         4 . The composition as claimed in any one of  claims 1  to  3 , characterized in that the ionic or ionizable groups have the formula  
       —[—CH 2 —CH(R) —O] x —(CH 2 ) y —COOH  
       or  
       —[—CH 2 —CH(R)—O] x —(CH 2 ) y —COOM  
       in which:  
       R is a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms,  
       x is an integer ranging from 0 to 5,  
       y is an integer ranging from 0 to 5,  
       M represents an alkali metal.  
     
     
         5 . The composition as claimed in any one of  claims 1  to  4 , characterized in that the ionic or ionizable groups are carboxyl groups —COO — Na+ linked directly to a carbon atom of the sugar skeleton, carboxymethyl (sodium salt) —CH 2 —COO — Na+ linked to a carbon atom of the sugar skeleton via an —O— bond.  
     
     
         6 . The composition as claimed in any one of  claims 1  to  5 , characterized in that said anionic polysaccharide also contains at least one nonionic group.  
     
     
         7 . The composition as claimed in  claim 6 , characterized in that the nonionic groups are linked to the carbon atoms of the sugar skeleton either directly or via —O— bonds.  
     
     
         8 . The composition as claimed in  claim 6  or  7 , characterized in that the nonionic groups have the formula:  
       —[—CH 2 —CH(R)—O] x —R 1    
       in which:  
       R is a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms,  
       x is an integer ranging from 0 to 5,  
       R 1  represents: 
 a hydrogen atom  
 an alkyl radical containing from 1 to 22 carbon atoms, optionally interrupted with one or more oxygen and/or nitrogen hetero atoms, cycloalkyl, aryl or arylalkyl, containing from 6 to 12 carbon atoms,  
 a radical —(CH 2 ) y —COOR 2  
 a radical —(CH 2 ) y —CN  
 a radical —(CH 2 ) y —CONHR 2    
 R 2  representing an alkyl, aryl or arylalkyl radical containing from 1 to 22 carbon atoms, and  
 y is an integer ranging from 0 to 5  
 • —CO—NH—R 1    
 R 1  having the definition given above, linked to a carbon atom of the sugar skeleton via an —O— bond.  
 
 
     
     
         9 . The composition as claimed in any one of  claims 6  to  8 , characterized in that said nonionic groups are the following groups: 
 methyl, ethyl, propyl, isopropyl, butyl, hexyl, octyl, dodecyl, octadecyl, phenyl, benzyl, linked to a carbon atom of the sugar skeleton via an ether, ester, amide or urethane bond, cyanoethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, linked to a carbon atom of the sugar skeleton via an —O— bond.  
 
     
     
         10 . The composition as claimed in any one of  claims 1  to  9 , characterized in that the hexose units (identical or different) of the main chain of the native skeleton are D-glucose, D- or L-galactose, D-mannose, D- or L-fucose or L-rhamnose units.  
     
     
         11 . The composition as claimed in any one of  claims 1  to  10 , characterized in that the neutral or anionic pentose and/or hexose units (identical or different) of the branches of the native skeleton are D-xylose, L- or D-arabinose, D-glucose, D- or L-galactose, D-mannose, D- or L-fucose, L-rhamnose, D-glucuronic acid, D-galacturonic acid or D-mannuronic acid units.  
     
     
         12 . The composition as claimed in any one of  claims 1  to  11 , characterized in that said native skeleton is a galactomannan, galactoglucomannan or xyloglucan, a xanthan gum, a scleroglucan, succinoglycans, a rhamsan or a welan gum.  
     
     
         13 . The composition as claimed in  claim 12 , characterized in that said native skeleton is a galactomannan.  
     
     
         14 . The composition as claimed in  claim 13 , characterized in that said anionic polysaccharide is a carboxymethyl galactomannan or a carboxymethyl hydroxypropyl galactomannan.  
     
     
         15 . The composition as claimed in  claim 14 , characterized in that said anionic polysaccharide is a carboxymethyl guar or a carboxymethyl hydroxypropyl guar.  
     
     
         16 . The composition as claimed in any one of  claims 1  to  15 , characterized in that it is in the form of 
 a solid, a dispersion or a concentrated aqueous solution, placed in contact with the fabric to be treated, after dilution in water;  
 a dispersion or a concentrated aqueous solution prespotted onto the dry fabric to be treated before dilution in water;  
 a dispersion or an aqueous solution to be placed directly onto the dry fabric to be treated without dilution or a solid support comprising said anionic polysaccharide, to be applied directly to the dry fabric to be treated;  
 or an insoluble solid support comprising said anionic polysaccharide placed directly in contact with the fabric to be treated, while wet.  
 
     
     
         17 . The composition as claimed in any one of  claims 1  to  16 , characterized in that it comprises from 0.05% to 10% of said anionic polysaccharide, expressed as dry matter.  
     
     
         18 . The composition as claimed in any one of  claims 1  to  17 , characterized in that said composition is 
 a solid or liquid detergent formulation comprising from 0.05% to 5% and preferably from 0.1% to 3% of said anionic polysaccharide, expressed as dry matter, capable of directly forming a washing bath by dilution;  
 a liquid rinsing and/or softening formulation comprising from 0.05% to 3% and preferably from 0.1% to 2% of said anionic polysaccharide, expressed as dry matter, capable of directly forming a rinsing and/or softening bath by dilution;  
 a solid material, especially a textile material, comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter, intended to be placed in contact with wet fabric in a tumble dryer;  
 an aqueous ironing formulation comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter;  
 a washing additive comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter, intended to be placed on the dry fabric prior to a washing operation using a detergent formulation optionally containing said anionic polysaccharide.  
 
     
     
         19 . The composition as claimed in any one of  claims 1  to  18 , characterized in that it contains at least one surfactant and/or one detergent additive and/or rinsing additive and/or softening additive for articles made of textile fibers and/or one solid support for said anionic polysaccharide.  
     
     
         20 . A process for caring for articles made of textile fibers, by treating said articles, in an aqueous or wet medium, with a composition forming the subject matter of any one of  claims 1  to  19 .  
     
     
         21 . The process as claimed in  claim 20 , characterized in that said articles contain at least 35% by weight of cotton, which is preferably colored.  
     
     
         22 . The use, in a composition for caring for articles made of textile fibers, of at least one anionic polysaccharide as defined in any one of  claims 1  to  15 .  
     
     
         23 . The use as claimed in  claim 22 , characterized in that said composition is 
 a solid or liquid detergent formulation comprising from 0.05% to 5% and preferably from 0.1% to 3% of said anionic polysaccharide, expressed as dry matter, capable of directly forming a washing bath by dilution;    a liquid rinsing and/or softening formulation comprising from 0.05% to 3% and preferably from 0.1% to 2% of said anionic polysaccharide, expressed as dry matter, capable of directly forming a rinsing and/or softening bath by dilution;    a solid material, especially a textile material, comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter, intended to be placed in contact with wet fabric in a tumble dryer;    an aqueous ironing formulation comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter;    a washing additive comprising from 0.05% to 10% and preferably from 0.1% to 5% of said anionic polysaccharide, expressed as dry matter, intended to be placed on the dry fabric prior to a washing operation using a detergent formulation optionally containing said anionic polysaccharide.    
     
     
         24 . The use as claimed in  claim 22  or  23 , characterized in that said articles contain at least 35% by weight of cotton, which is preferably colored.